Olive leaf trimmings transformed into liver cancer-fighting nanoparticles
Mohamaden YM, El-Hawary SS, El-Fakharany EM, El-Maradny YA, El Raey M
Medicinal Plants
The olive leaves and prunings that most gardeners toss or burn carry compounds like rutin and quercetin that just helped scientists build nanoparticles selective enough to target liver cancer cells over healthy ones.
Researchers took leftover leaves and trimmings from olive trees, normally just waste, and used their natural plant compounds to grow tiny zinc oxide particles. In lab dishes, these particles were especially good at killing liver cancer cells while leaving more normal cells unharmed, and they worked better than a crude olive leaf extract or a standard chemotherapy drug. The team also traced the chemistry showing which olive compounds, like quercetin and rutin, likely plug into cancer-related proteins to trigger this effect.
Key Findings
OL-ZnONPs showed the greatest selectivity toward HepG-2 liver cancer cells, with IC50 = 0.344 µg/mL and a selectivity index of 5.279, outperforming crude extract and the chemo drug 5-FU
Nanoparticles had a hexagonal wurtzite structure, ~15.5 nm crystallite size, and contained 11 phenolic compounds led by rutin (354.15 µg/g), 3,4-dihydroxybenzoic acid (78.21 µg/g), and quercetin (45.75 µg/g)
Treatment increased caspase-3/9 (apoptosis markers), lowered inflammatory TNF-α and IL-6, reduced cancer cell migration, and docking showed rutin and quercetin bind favorably to the AKT1 cancer-pathway protein
chevron_right Technical Summary
Scientists turned olive tree pruning waste into tiny zinc oxide nanoparticles that killed liver cancer cells in lab tests while sparing more of the healthy ones, outperforming a common chemo drug.
Abstract Preview
Original paper
Sustainable nanomedicine from olive leaf waste: biosynthesized ZnONPs with mechanistic validation against hepatocellular carcinoma.
Agri-food waste is an underutilized source of valuable bioactive compounds. In this study, olive leaf pruning residues (Olea europaea L. cv. Soury) were used for the green synthesis of zinc oxide n...
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The olive is a species of subtropical evergreen tree in the family Oleaceae. Originating in Asia Minor, it is abundant throughout the Mediterranean Basin, with wild subspecies in Africa and western Asia; modern cultivars are traced primarily to the Near East, Aegean Sea, and Strait of Gibraltar. ...